Organic Fertilizer Calculator
Created by Nick Andrews of Oregon State University and John Foster of Oregon Tilth.
A free spreadsheet that will help you select the organic fertilizers that are the most cost effective and that best match your soil and crop requirements. (Microsoft Excel is required to use this spreadsheet.)
GCSAA
Golf Course Superintendents Association of America. "Promoting Environmentally Better and Safer Golf Courses."
Oregon Golf Course Superintendents Association
Western Washington Golf Course Superintendents Association
Midwestern Bio Ag
Midwestern Bio-Ag is a biologically-based agricultural consulting company, founded in 1984. We bring our services to more than 3,500 farms in nine states through a network of more than 75 skilled, knowledgable, in-the-field, hands-on consultants. Our consultants are supported by a staff rich in education and experience in veterinary medicine, animal nutrition, soil management, cropping systems, soil organisms, and biological farming systems.
Washington State Department of Agriculture
WSDA serves the people of Washington State by supporting the agricultural community and promoting consumer and environmental protection.
Washington State Grape Society
The purpose of the Washington State Grape Society organization is for the overall advancement of the grape industry in the state of Washington. Its duties include collecting and distributing valuable data and information to our members; and protecting stimulating and assisting the grape interest in the state. Members are growers and industry personnel who have an interest in and lend their assistance to promoting the organization's purpose.
Washington Horticultural Association
To advance and enhance the tree fruit industry in Washington State by providing education and training programs to meet the changing needs of the tree fruit industry and serving as the organization to impact political matters affecting the tree fruit industry.
Oregon Winegrowers Association
To celebrate, promote, protect, and sustain Oregon's world class wines and our wine community.
International Sports Turf Research Center, Inc.
ISTRC's main objective is to provide superintendents with the information that not only identifies the greens'/athletic fields' physical properties, but also provides the necessary information to be proactive with regards to cultural practices that affect the turf.
United States Golf Assocation
The USGA acts in the best interests of the game for the continued enjoyment of those who love and play it.
The Fertilizer Institute
TFI is the trade association representing the fertilizer industry. From manufacturers, to retailers to brokers, traders and transporters of commercial fertilizers, we represent companies that are, in some way, involved in making commercial fertilizers—or plant food—available to farmers here in the U.S. and worldwide.
Organic Materials Review Institute (OMRI)
Is a 501(c)(3) nonprofit organization created to benefit the organic community and the general public. Its primary mission is to publish and disseminate generic and specific (brand name) lists of materials allowed and prohibited for use in the production, processing, and handling of organic food and fiber. OMRI also conducts scientific research and education on the use of materials by the organic industry.
Organic Farming Research Foundation
Is a non-profit foundation founded to sponsor research related to organic farming practices, to disseminate research results to organic farmers and to growers interested in adopting organic production systems, to educate the public and decision-makers about organic farming issues.
Washington State Organic Food Program
Protects consumers and supports the organic food industry by ensuring the integrity of organic food products through establishing organic standards and certifying organic producers, processors, and handlers.
Kinsey's Agricultural Services
Specializing in correcting soil fertility problems of farms, ranches, vineyards, orchards, gardens and lawns...
